Baby bottle nipple



FIG. 1 is a perspective view of a baby bottle nipple, showing my new design;

FIG. 2 is a side elevational view thereof, with all other sides being identical thereto;

FIG. 3 is a top plan view; and,

FIG. 4 is a bottom plan view. 

The ornamental design for a baby bottle nipple, as as shown and described. 